Fluid cylinder



Dec. 6, 1960 G. F. CAMP 2, ,975

FLUID CYLINDER Filed Nov. 19. 1958 2 Sheets-Sheet 1 sag/92p Sea /00.5

- 7 IN VENTOR. Geo/ye F Cam 0 ATTORNEYS Dec. 6, 1960 Filed Nov. 19, 1958 2 Sheets-Sheet 2 Q E g Q M a INVENTOR. a Geo/ye CbW O ATTIJ R N EYS nited States Patent FLUID CYLINDER George F. Camp, 5918 E. Latimer Place, Tulsa, Okla.

Filed NOV. 19, 1958, Ser. No. 774,871 7 1 Claim. (Cl. 103-475) This invention relates to fluid cylinders particularly of the type used for pumps, and in particular a pair of spaced parallel liners providing walls of the cylinders, extended between and secured in head and foot sections, a large suction manifold and a small discharge manifold bolted to the head and foot sections, valves between the manifolds and ends of the cylinders, and piston rods extended from pistons in the cylinders through the foot section.

The purpose of this invention is to provide a built up fluid cylinder wherein liners forming the cylinders and also valves at the ends of the cylinders are readily removable and replaceable.-

lConventional pumps of this type are machined from castings :with thecylinders bored through cast material and, in some instances provided with liners and the valves and cylinder heads are bolted to machined surfaces all of; which require accurate and very skillful machine operations. In making repairs in a'conventional pump substantially all parts are removed from the cylinder block and such parts are machined or ground to eliminate wear. Such operations are costly and time consuming.

With this thought in mind this invention contemplates apump unit in which the cylinders are formed with liners clamped between head and foot sections and where in valve assemblies and suction and discharge headers are'secured by bolts to the head and foot sections of the cylinders.

The object of the invention is, therefore, to provide a fluid cylinder in which the parts are readily taken apart for replacement and repair and are also readily assembled to form a complete operative fluid cylinder.

Another object of the invention is to provide a fluid cylinder in which a comparatively small amount of clearance is required between the suction and discharge valves and wherein the small clearance is used without increasing the fluid velocity, thereby enabling a pump to create a high vacuum and develop higher speeds.

Another important object of the invention is to provide a fluid cylinder in which air pockets are reduced to a minimum and wherein any gas that is freed in pumping a gaseous fluid would be pocketed under the discharge valve and expelled ahead of the fluid making an accumulation of gas impossible.

It is yet another object of the invention to provide a fluid cylinder wherein turbulant flow of gases being drawn into and discharged from the cylinder is reduced to a minimum.

A further object of the invention is to provide a fluid pressure cylinder wherein the discharge valves are smaller than the suction valves so that the cylinder may operate without hammer or shock resulting from the slip back of the fluid.

A still further object of the invention is to provide :1 fluid cylinder in which the parts are removable for replacement or repair by removing several bolts.

And a still further object of the invention is to provide tions positioned on the ends of the liners, a suction head with the drawings, wherein:

Figure l is a longitudinal section through the fluid cylinder with some of the valve cages shown in elevation and with one of the cages shown in section.

-'Figure 2 is a cross section through the cylinder taken on line 2--2 of Figure 1.

Figure 3 is a plan view illustrating the arrangement of the valves.

Referring now to the drawings wherein like reference characters denote corresponding parts the improved fluid cylinder of this invention includes liners 10 and 11, a head section 12, a foot section 13, a suction head 14, a discharge head 15, valve cages 16 positioned between the suction and discharge heads and the head and foot sections of' the housing, valves 17 in the valve cages and positioned to coact with valve seats 18 and pistons 19 in a counterbore 23 in the head section 12 and the op posite end is positioned in a similar counterbore 24 in the foot section 13.

The valve cages 16 are positioned against end surfaces 25 of the head section 12 and against similar surfaces 1 26 of the foot section 13 and the lower surfaces'of the valve cages are provided with annular grooves 26 in which packing rings 27 are positioned. The upper ends of the valve cages are also provided with annular grooves 28 and packing rings 29 are positioned in the grooves 28.

The valve cages are clamped between the suction and discharge headers and the head and foot sections by bolts or securing elements 30 which extend through flanges 31 of the suction head 14 and 32 of the discharge header 15 and these bolts are threaded into the head and foot sections of the housing, as shown in Figure 1.

The valve disc 17 nests in sealing washers 33, of neoprene or the like and the Washers 33 are backed by a disc 34 against which large ends of conical-shaped springs 35 are positioned and the upper ends of the springs are positioned over a collar 36 of a hub 37 in the outer end of each of the valve cages.

The parts of the valve are retained in assembled relation by a stud 38 slidably mounted in sleeves 39 in the hub 37 and the studs are provided with nuts 40 and 41 by which the valve disc 17, neoprene washers 33 and backing disc 34 are secured in assembled relation.

The lower ends of the valve cages are provided with openings 42 that provide communicating means between ends of the liners and discharge and suction headers and the outer ends of the cages are provided with openings 43 that provide communicating means between the valve cages and suction and discharge headers.

The suction header 14 is provided with a flange 44 for connecting the fluid cylinder to a fluid supply and the discharge header 15 is provided with a flange 45 for con meeting the discharge header to a storage tank or the like.

Patented Dec. 6, 1960 The relative positions of the valve cages is illustrated in Figure 3 wherein branch connections 46 extend from the valve cages to a discharge connection on which the flange is positioned.

The piston rod 20 of the piston 19 extends through a combination packing gland and bearing 47 in which a disc 48 having a threaded sleeve 49 extended from the inner side is positioned and the inner part of the foot section is provided with an annular bearing ring 50 that provides a closure for the inner end of the gland 47. The foot section is also provided with a grease fitting 51 through which grease is forced through an opening '52 into the gland 47.

The ends of the cylinders or liners 10 and 11 positioned in the foot section 13 are also provided with annular grooves 53 in which packing rings 54, similar to the rings 22 in the grooves 21, are positioned.

The head and foot sections of the cylinder 10 are provided with flanges 55 and 56 and similar sections of the cylinder 11 are provided with similar flanges 57 and 58 and bolts 59 and 60 extend through the flanges securing the head and foot sections in predetermined positions over the ends of the lines or cylinders.

Each of the sections may also be provided with a foot 61 by which the fluid cylinder is supported on a foundation or other surface.

The foot sections 13 are also provided with annular recesses 62 in which an end portion of a power frame 63 is positioned.

Pistons of any suitable type or design may be used, however, in the design shown the pistons 19 are provided with end sections 64 and -65 and the pistons are secured on the rod 21 by nuts 66, such as castle nuts and the castle nuts are threaded on studs 67 extended from the inner edges of the piston rods, and secured in position by pins 68.

It will be understood that modifications, within the scope of the appended claim, may be made in the design and arrangement of the parts without departing from the spirit of the invention.

What is claimed is:

A fluid pump comprising a pair of spaced parallel cylindrical liners, a head section having counterbores receiving ends of the liners, a foot section also having counterbores receiving the opposite ends of the liners,

said head and foot sections each including side portions and said head and foot sections each having flanges thereon arranged in a plane parallel to the axes of the said liners, inlet valve cages having spring pressed check valves therein positioned contiguous to and abutting side portions of the head and foot sections, a suction header having its ends positioned contiguous to the inlet valve cages, flanges on the suction header, securing elements extending through the flanegs on the suction header and connected to the flanges on the head and foot sections clamping the inlet valve cages in place, outlet valve cages having spring pressed check valves therein positioned contiguous to the side portions of the head and foot sections opposite to the sides on which the inlet valve cages are positioned, the ends of the valve cages being provided with openings that provide communicating means between ends of the liners and the discharge and suction headers, branch connections extending from the outlet valve cages to a common discharge connection, and said branch connections defining a discharge header, said discharge header being positioned contiguous to the outlet valve cages, flanges on the discharge header, securing elements connecting the last named flanges to the flanges on the head and foot sections clamping the outlet valve cages in place, pistons positioned in said liners, piston rods extending from said pistons and projecting through the foot sections, said head and foot sections each being provided with flanges thereon arranged in a plane perpendicular to the axes of the said liners, and securing elements engaging said last named flanges securing the head and foot sections in position on the ends of the liners.

References Cited in the file of this patent UNITED STATES PATENTS (No number) Pierce Feb. 23, 1831 92,957 Gould July 27, 1869 241,455 Verniaud May 10, 1881 638,890 Sparks Dec. 12, 1899 1,116,732 Primeau Nov. 10, 1914 1,513,584 Cornwall Oct. 28, 1924 2,331,513 Stahl Oct. 12, 1943 FOREIGN PATENTS 402,810 France Sept. 8, 1909 

